diff --git a/Makefile b/Makefile
index 93247e6..7a66f1a 100644
--- a/Makefile
+++ b/Makefile
@@ -31,12 +31,13 @@ all: build
 
 .PHONY: fmt-check
 fmt-check:
-	# get all go files and run go fmt on them
-	@files=$$($(GOFILES) | xargs $(GOFMT) -l); if [ -n "$$files" ]; then \
+ 	# get all go files and run go fmt on them
+	@diff=$$($(GOFMT) -d $(GOFILES)); \
+	if [ -n "$$diff" ]; then \
 		echo "Please run 'make fmt' and commit the result:"; \
-		echo "$${files}"; \
+		echo "$${diff}"; \
 		exit 1; \
-		fi;
+	fi;
 
 fmt:
 	$(GOFMT) -w $(GOFILES)